Method of combatting insects and acarids using 1-aryl-4-trifluoromethyl-5-aminopyrazole

摘要

A method of combating insects and acarids which comprises applying to such insects, acarids or a habitat thereof, an insecticidally or acaricidally effective amount of a 5-amino-1-aryl-pyrazole of the formula <IMAGE> in which R1 represents hydrogen, alkyl or halogenoalkyl, R2 represents trifluoromethyl, R3 represents hydrogen, alkyl or alkenyl, R4 represents hydrogen, alkyl, alkenyl, alkinyl or a <IMAGE> radical, and Ar represents in each case optionally substituted phenyl or pyridyl, where X represents oxygen or sulphur, and R5 denotes alkyl or halogenoalkyl. Some of the compounds are new.